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Title: Entangling gates for local spin qubits by using electric current
Authors: Xiong, S.-J.
Xiong, Y.
Oh, C.H. 
Issue Date: 10-Sep-2010
Source: Xiong, S.-J., Xiong, Y., Oh, C.H. (2010-09-10). Entangling gates for local spin qubits by using electric current. Physical Review A - Atomic, Molecular, and Optical Physics 82 (3) : -. ScholarBank@NUS Repository.
Abstract: We show that entanglement between two local spins which are initially independent and act as qubits can be established by applying an electron current through them. The setup can be realized by using spin-12 quantum dots as the qubits and equally connecting them to leads with the tip of scanning tunnel microscopy. The tunneling of electrons through two dots is in the sequential regime and the entanglement between dots originates from the quantum coherence of two tunneling channels. We calculate the effect of the electron current on the entanglement of local qubits fully quantum-mechanically by using extended scattering-matrix theory and analyze the favorite conditions for the realization of entangling gates. © 2010 The American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
ISSN: 10502947
DOI: 10.1103/PhysRevA.82.032309
Appears in Collections:Staff Publications

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